//package com.zzx.schoolfellow.service;
//
//import com.baomidou.mybatisplus.extension.service.IService;
//import org.springframework.stereotype.Service;
//
//import java.util.List;
//
//@Service
//public interface UserService extends IService<User>{
//
//    public List<User> getAllUsers() ;
//    public User getUserById(Long id) ;
//
//    public User createUser(User user);
//
//    public User updateUser(Long id, User user);
//
//}
